spark-metal

An embedded ARM experiment with GPIO in Rust/C. Displays a randomly colored light with each button press on the core. Some pieces of spark's firmware have been included.

Thanks to spark/bootloader and spark/firmware for the spark reference, as well as antoinealb/rust-demo-cortex-m4 for documenting the rust cross-compile process.

dependencies

• hardware: spark core, jtag shield, st-link 2
• gcc-arm-none binutils
• nightly rust
• stlink
• an unlocked spark bootloader (instructions at spark/bootloader)

build

• git clone https://github.com/rust-lang/rust
• git clone https://github.com/friedm/spark-metal
• cd rust && git checkout $(rustc --version | sed 's/.*(//g' | head -c9) -- get the source for your version of rustc
• cd ../spark-metal && make libcore -- cross-compile libcore for your version of rustc
• make -- build flashable spark-metal.bin
• make load -- build and automatically flash over stlink-2

plans

• uart driver
• malloc
• driver for the core's CC3000 wifi module